petsc-master 2019-08-22
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PetscShmCommGlobalToLocal

Given a global rank returns the local rank in the shared memory communicator

Synopsis

#include "petscsys.h"  
PetscErrorCode PetscShmCommGlobalToLocal(PetscShmComm pshmcomm,PetscMPIInt grank,PetscMPIInt *lrank)

Input Parameters

pshmcomm - the shared memory communicator object
grank - the global rank

Output Parameter

lrank -the local rank, or MPI_PROC_NULL if it does not exist

Developer Notes

Assumes the pshmcomm->globranks[] is sorted

It may be better to rewrite this to map multiple global ranks to local in the same function call

Level

developer

Location

src/sys/utils/mpishm.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages